#! /bin/sh

STATS_FILE=/var/tmp/${USER}_stats_top
DELAY=1

# FreeBSD uses jot(1) while Linux uses seq(1)
which jot 1> /dev/null 2> /dev/null || alias jot=seq

__freebsd() {
  top -s ${DELAY} -d 2 0  \
    | grep -m 1 CPU \
    | sed 's/,//g' \
    | awk '{ print $4": "$3" | "$6": "$5" | "$8": "$7" | "$10": "$9" | "$12": "$11 }'
  }

__linux() {
  top -d ${DELAY} -n 2 -b \
    | grep -m 2 Cpu \
    | tail -1 \
    | sed 's/%/ /g' \
    | awk '{ print "User: " $2 " | System: " $4 " | Nice: " $6 " | Idle: " $8 }'
  }

__exit() {
  rm -rf ${STATS_FILE}
  exit 0
  }

trap '__exit' 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
OS=$( uname )
while true
do
  for I in $( jot 128 ); do
    case ${OS} in
      (FreeBSD) __freebsd >> ${STATS_FILE} 2>&1 ;;
      (Linux)   __linux   >> ${STATS_FILE} 2>&1 ;;
      (*)       echo "supported systems: FreeBSD Linux"; exit 1 ;;
    esac
  done
  sleep 1
  :> ${STATS_FILE}
done